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We protect human health and the quality of Idaho's air, land, and water.

Recent News

DEQ seeks livestock and grazing representative for the Middle Snake Watershed Advisory Group

March 2, 2026 | News Releases

TWIN FALLS – The Idaho Department of Environmental Quality (DEQ) is seeking a representative to fill a vacancy on the Middle Snake Watershed Advisory Group (WAG).

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DEQ awards $3,200,000 to the Bailey Creek Homeowners Association in Caribou County

February 25, 2026 | Construction Grant, News Releases

BOISE – The Idaho Department of Environmental Quality (DEQ) awarded a $3,200,000 low-interest drinking water construction loan to the Bailey Creek Homeowners Association in Caribou County, Idaho.

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DEQ seeks member for Clearwater Basin Advisory Group

February 25, 2026 | News Releases

LEWISTON – The Idaho Department of Environmental Quality (DEQ) is seeking a representative to fill a vacancy on the Clearwater Basin Advisory Group (BAG). 

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DEQ preparing draft 401 water quality certification for Ashton Hydroelectric Project

February 3, 2026 | News Releases

IDAHO FALLS – The Idaho Department of Environmental Quality (DEQ) is preparing a draft 401 water quality certification for the Ashton Hydroelectric Project—Federal Energy Regulatory Commission (FERC) …

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Did You Know?

DEQ does not regulate contrails. For more information on aircraft emissions or to access EPA’s or the U.S. Federal Aviation Administration’s (FAA’s) aircraft regulations, visit the Regulations for Emissions from Aircraft. The FAA also has a website on emissions with links to contrails research.
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